Supernatural Imagines/One shots

Imagine Dean about to die and you save him, but he thought you were dead

Dean backs up, holding out his only weapon, a silver knife. He knows it's hopeless. The angel smiles wickedly and steps forward, moving in for the kill. Dean closes his eyes and thinks "This is it. At least I'll be with Y/N soon." You were his girlfriend and he was in love with you. He planned to ask you to marry him but then you died on a hunt, and he lost you. He grieved for weeks and thought about trying to make a deal with a crossroads demon to resuscitate you. Sam talked him out of it, saying that you wouldn't have wanted that. So Dean dropped it and tried to move on. But that's easier said than done. His hunting performance dropped and he drank more than ever. He never could quite get you off his mind.
So now, he's cornered in a warehouse by a pissed off angel, and there's no escape. The angel raises his hand to kill Dean when suddenly he screams in pain as he is stabbed in the back. The room fills with a strong bright light and Dean covers his eyes with his hands. The angel falls to the ground as the knife is pulled from his back. He's dead.
Dean slowly opens his eyes and sees you standing over the body of the angel, an angel blade clutched in your hand. Dean stands up, shocked.
"Y/N?" You look up and open your eyes. They're pitch black. Dean stumbles back, and reaches in his pocket for holy water.
"What the hell are you doing? She's dead. You're dead!" Dean shouts, grief rising in his voice. This is a fate worse than death: seeing your body possessed by a demon.
"But that's the thing, Dean. I'm not dead. That's just what you think. I'm okay, I'm just a little different."
"A little different? You're a demon!!!" He shouts angrily.
"This can't even really be you! Your body is possessed!"
"Dean, I know how you feel about demons, but I just wanted you to have some closure." Staring at him with your black eyes, you take a step closer.
"I love you so much and I'm sorry. But I remember your affection for pie. I render you telling me stories about little Sammy. I remember you letting me wear your jackets when I got cold. I remember our first kiss, after the hunt with the wendigo, in the impala, AC/DC playing in the background and both of us covered in blood. I know you don't want me around, but I just wanted to tell you how much I love you." Tears fall from your eyes and you wipe them away. Dean face is a mask of shock and grief. You hesitantly step closer and kiss his cheek.
"I love you." You whisper. Then, you drop the angel blade and turn and race out of there. Tears stream down your and Dean's face. Maybe that was a mistake...